0
{5: 1, 8: 1}
{5: 2, 8: 2, 2: 1, 19: 1}
{5: 2, 8: 2, 2: 1, 19: 2, 18: 1, 20: 1}
{5: 2, 8: 2, 2: 1, 19: 2, 18: 1, 20: 1, 10: 1, 17: 1}
{5: 1, 8: 2, 2: 1, 19: 2, 18: 1, 20: 1, 10: 1, 17: 1}
2